EP2015055A1 - Procédé et dispositif destinés à la réalisation d'un contrôle de combustion sur un échantillon - Google Patents

Procédé et dispositif destinés à la réalisation d'un contrôle de combustion sur un échantillon Download PDF

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Publication number
EP2015055A1
EP2015055A1 EP08012374A EP08012374A EP2015055A1 EP 2015055 A1 EP2015055 A1 EP 2015055A1 EP 08012374 A EP08012374 A EP 08012374A EP 08012374 A EP08012374 A EP 08012374A EP 2015055 A1 EP2015055 A1 EP 2015055A1
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EP
European Patent Office
Prior art keywords
burner
camera
specimen
test
flame
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP08012374A
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German (de)
English (en)
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EP2015055B1 (fr
Inventor
Martin Behrendt
Bahman Dr. Sarabi
Wilfried Teering
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Underwriters Laboratories Inc
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UL INTERNATIONAL TTC GmbH
Bayer MaterialScience AG
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Publication of EP2015055A1 publication Critical patent/EP2015055A1/fr
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M99/00—Subject matter not provided for in other groups of this subclass
    • G01M99/002—Thermal testing

Definitions

  • the invention relates to a method and a device for carrying out a firing test on a test object.
  • Materials are working materials of a purely material nature, which are further processed as production objects in production processes and enter into the respective end products. As a rule, these are solids, such as metals or plastics. Before the end products manufactured from such materials can be discontinued by the manufacturer, the end products must undergo a variety of tests in order to exclude potential product risks to a product user and, accordingly, to minimize the manufacturer's liability risk. For this reason, end products, for example, undergo a fire test in order to be able to assess the end product with regard to the risk of fire.
  • pre-selection tests are usually on test specimens, which consist of the material to be tested, and a standardized, simple form, such. B. rectangular rod-shaped, own.
  • the European Standard EN 60695-11-10 specifies a test method for assessing the risk of fire of materials.
  • the so-called vertical burning test a burner is held at a distance of 10 millimeters under a rod-shaped test piece, which is suspended vertically with respect to its longitudinal axis, each twice for 10 seconds.
  • the flame is set to 50 watts nominal value.
  • the so-called afterburning time of the test specimen is determined, which is then categorized on the basis of the determined afterburning periods into different categories which are specified in more detail in the abovementioned standard.
  • Process for fire testing such.
  • to carry out the method described in the above-mentioned European standard are performed in the prior art of operators who keep a burner for the times specified in the standard and in the specified in the respective standard distances to the test body for the flame.
  • a test procedure conducted by persons is also subject to subjective, personal influences. For example, the distance between burner and flame will only approximate the distance specified in the standard.
  • the object of the invention is therefore to provide an improved method for carrying out a combustion test on a Maschinenstoffprüfling.
  • the object of the invention is also to provide an improved apparatus for performing a burning test on a Maschinenstoffprüfling.
  • a method for carrying out a firing test on a material sample comprises the step of image data acquisition of the test object with at least one first camera. Furthermore, the image processing of the image data recorded with the at least one first camera takes place, wherein a reference point of the test object is determined. In a further method step, the burner is positioned at a predetermined first distance to the reference point for flame treatment of the test object.
  • the test object is optically detected with at least one first camera.
  • the image data obtained are processed in the image processing, whereby the reference point is determined via an image of the test object.
  • the reference point is an "imaginary" point in the test object, which is determined by image processing.
  • the burner is automatically positioned at the first distance to the reference point.
  • the inventive method has the advantage that thus the distance between the burner and the reference point within a certain tolerance range always the first distance equivalent.
  • substantially the same first distance can be realized for all material samples that are subjected to the firing test.
  • the first distance is thereby preferably measured relative to the burner tip.
  • the at least one first camera further comprises an interference bandpass filter for suppressing the detection of the burner flame.
  • an interference bandpass filter for suppressing the detection of the burner flame.
  • the at least one first camera is a black-and-white camera, preferably a high-speed CMOS camera.
  • the at least one first camera is irradiated by a red light emitter for suppressing the detection of the burner flame, wherein the red light emitter also illuminates the specimen.
  • the red light emitter outshines the burner flame, so that the camera essentially absorbs the shadow cast by the red light emitter, with the shadow cast corresponding to the contours of the specimen.
  • the at least one first camera further comprises a polarizing filter.
  • the light from the red light emitter or the red light emitters is linearly polarized, and the polarizing filter of the first camera is aligned so as to have a small filtering effect for the linearly polarized light.
  • the red light emitter or the red light emitters overshadow the red light flame and, on the other hand, the detection of the flame by the camera is ensured by the linearly polarized filter ensuring that essentially only the light of the red light emitters is detected as background illumination, since that of the burner flame emitted light has no linear polarization.
  • the image processing of the image data of the burner flame recorded with at least one second camera also takes place, the color of the burner flame being determined by means of the image data.
  • the color of the burner flame is then compared with the color of a desired flame, the burner being replaced if the color of the burner flame substantially does not correspond to the color of the target flame.
  • the image processing of the image data of the burner flame recorded with at least one second camera also takes place.
  • the second camera is preferably a color camera.
  • the flame is checked by determining the color values of the flame in accordance with the rgb color model and comparing them with predefined color values according to the rgb color model of a desired flame.
  • a color is specified using three color values. The first color value indicates the proportion of red, the second color value indicates the proportion of green and the third color value indicates the proportion of blue in the color. The percentages are typically specified in percent.
  • the burner is replaced if it is detected by the image processing that the color values of the flame do not correspond to the color values of the target flame.
  • the specimen is repositioned from a sample magazine to a position in which the specimen is optically detectable by the at least one first camera and is flammable by the burner, wherein the specimen magazine is provided for receiving a plurality of specimens.
  • the sample magazine may be designed such that it has, for example, a hot-air oven and a drying chamber in order to realize storage of the samples according to the temperatures and atmospheric humidities specified in the burning test standard.
  • the image processing of the image data of the test object recorded with at least one third camera takes place. Furthermore, it is determined on the basis of the at least one third camera recorded image data, whether the test specimen burns. For the classification of the material from which the test specimen Under certain circumstances, it may be necessary to determine whether a) the candidate is on fire and b) how long the candidate is burning. According to the method, this can be achieved by recording the test object with a third camera, which is preferably a color camera. By the image processing of the image data thus obtained, it is then possible to determine, for example, the burning time of the test object.
  • the determination also takes place on the basis of the image data recorded with the at least one third camera, as to whether the test object is glowing.
  • the image of a burning test object will be much brighter than that of a glowing test object. This is again brighter than that of a non-glowing and non-burning test specimen.
  • Threshold values can be specified for image processing in order to distinguish a burning test object from a glowing or non-burning test object. If, for example, the mean brightness of the recording of the test object exceeds a first threshold value, then the test object is recognized as being burning. If the average brightness lies between the first and a second threshold value, then the test object is classified as glowing. Accordingly, the image processing recognizes that the test object neither glows nor burns when the average brightness is smaller than the second threshold value.
  • the specimens are formed substantially rectangular rod-shaped.
  • the specimen is suspended from a fixture with the longitudinal axis of the specimen aligned vertically.
  • With the at least one first camera image data of a first surface side and a second surface side are recorded.
  • the first and second surface sides are aligned parallel to the longitudinal axis and the first and second surface sides are oriented substantially perpendicular to each other.
  • the image processing determines a first guideline extending horizontally along the first surface side and a second guideline extending horizontally along the second surface side, wherein the reference point corresponds to the intersection of the first and second guideline projected towards the middle of the stick.
  • two sides of the rectangular, rod-shaped test object are detected and evaluated, with one guideline being determined for each surface side, by means of which the reference point is then determined.
  • the first guideline extends as far as possible down through the first surface side of the vertically positioned test specimen and has at least a first predetermined minimum length.
  • the second directive is at the same level as the first directive.
  • the detection of a first region of the first surface side is furthermore carried out, wherein the first region comprises the first surface side below the first directive. Furthermore, the detection of a thread, if the area has a predetermined minimum height and a predetermined minimum width.
  • the image data acquisition of a second area is also performed by the at least one first camera, wherein the second area is between the test object and the burner.
  • a drop is detected by the image processing of the image data of the second area recorded with the at least one first camera if a part of the test object which has moved in the second area and has detached itself from the test object is detected in the image data.
  • the moving part corresponds to a drop originating from the test object.
  • the drop is only detected according to an embodiment of the invention if it has a predetermined minimum size and falls with at least one predetermined minimum speed.
  • the first camera is therefore preferably a high-speed camera, since the falling drop is therefore particularly easy to detect.
  • the positioning of cotton wool at a predetermined second distance below the specimen wherein the cotton wool is optically detected by at least a fourth camera or other optical detector, such as an infrared sensor, wherein by means of image processing of the at least a fourth camera or the optical detector detected image data is determined whether a departing from the test specimen drops the cotton wool ignited.
  • the cotton wool can be kept in the form of a cotton roll in a cotton roll magazine, for example.
  • the cotton roll magazine is similar to the above-mentioned sample magazine shielded by silica gel to achieve a predetermined in a test standard storage climate.
  • a cotton ball can be cut from the cotton roll and placed over a positioning system at the predetermined second distance under the specimen.
  • the cotton portioning system can be designed such that the cotton ball cut out of the cotton roll magazine has a size of 50 mm ⁇ 50 mm and does not exceed a weight of 0.08 grams. If, for example, the cotton ball ignites due to dripping and burning parts of the test specimen, this can also be detected by image processing and the burning cotton ball can be extinguished by means of nitrogen nozzles.
  • the test specimen is fired for a predetermined first period of time, the burner being positioned at the predetermined first distance below the reference point, with the center axis of the burner being vertically aligned, and the first distance readjusted during flame exposure. Further, the repositioning of the burner takes place after the first period of time, so that the burner has no influence on the test specimen. For example, the burner in a horizontal direction of movement to a distance of max. 150 millimeters away from the test object.
  • the determination of a first afterburning time of the test object takes place, wherein the first afterburning time corresponds to the time span between the end of the first time duration and the time of extinction of the test object.
  • the specimen is flamed for a predetermined second period of time as soon as the specimen stops burning.
  • This is followed by the determination of the second afterburning time of the test object, with the second afterburning time corresponding to the time span between the end of the second time duration and the time of extinction of the test object.
  • the central axis of the burner is tilted during the flame of the specimen, if a drop is detected, the burner is also optionally removed in a horizontal direction of movement of the sample, so that the droplet does not affect the burner flame and the burner again with a vertically oriented central axis is positioned below the test specimen at the first distance as soon as the droplet has dropped off.
  • the storage of the first and second afterburning periods and, if appropriate, the storage of the information that a drop has left the test specimen and optionally storage of a fire of the cotton swab positioned below the test specimen takes place.
  • the burning test specimen for example after the end of the burning test, is extinguished by means of nitrogen nozzles.
  • the method is carried out for a total of five specimens of the same material. Furthermore, the material is classified in classes V-0, V-1 or V-2 according to EN 60965-11-10. In this case, the first and second afterburning periods, if appropriate the information as to whether one or more of the five test pieces are burned through or annealed until they are fixed, and also, if appropriate, a detected ignition of the cotton wool are used for the classification.
  • the test specimen is fired five times for a respective predetermined third period of time.
  • the burner is thereby positioned at the predetermined first distance below the reference point, so that the center axis of the burner is aligned approximately at an angle of 20 ° to the vertical. Furthermore, the distance is readjusted during the flame treatment.
  • the burner is repositioned for a given fourth period of time, so that it has no influence on the test object during the fourth period of time.
  • a third afterburning time of the test piece is determined following the fifth flame treatment.
  • the third afterburning time corresponds to the period between the termination of the fifth flame and the time of extinction of the test object.
  • there is a storage of the third afterburning time and, if appropriate, the storage of the information takes place that a flaming of the cotton swab positioned below the sample has taken place.
  • the third afterburning time is determined for five test pieces of a material.
  • the third afterburner periods of the five test specimens and / or a detected ignition of the cotton wool are used for a classification of the material of which the test specimens are made in accordance with DIN EN 60695-11-20.
  • the total after-burn time is less than 60 seconds or not.
  • the total afterburn time is calculated as the sum of the third afterburn periods measured for the five samples. If the total afterburn time is less than 60 seconds, the test for the material is passed. Otherwise, the test is failed. In the case of a passed test, another test is made of a plate made of the material, whereby it is detected whether or not the flame causes perforation in the plate after a certain time. When forming holes, the material will be class 5VB if no hole is formed 5VA.
  • the test specimen is formed substantially rectangular rod-shaped. Further, the specimen is fixed so that the longitudinal axis of the specimen is substantially horizontal and the transverse axes are oriented substantially at an angle of 45 ° to the horizontal.
  • a first mark and a second mark are mounted across the longitudinal axis. The first mark is a predetermined fourth distance away from a third surface side of the specimen. Further, the second mark is a predetermined fifth distance away from the third surface side. The third surface side is perpendicular to the longitudinal axis of the specimen.
  • Image processing determines a third guideline for the specimen, with the third guideline running along the bottom edge of the material and the reference point being the intersection of the third guideline with the third surface side.
  • the burner is positioned at the first distance from the reference point so that the center axis of the burner intersects the third guideline at an angle of 45 ° and the tip of the burner is on the extended guideline.
  • the test specimen is flame-treated for a predetermined fifth time period or until the flame front reaches the first mark. Further, a sixth time period is determined, wherein the sixth time period of the time until the flame front reaches the second mark from the first mark, or the time until the flame extinguishes starting from the first mark.
  • a damage length of the test object is determined by the image processing of the image data recorded by the spent test object, if the Flame front extinguished before reaching the second mark. The sixth time period and, if appropriate, the damage length are stored.
  • a classification of the material into the classes HB40 or HB75 according to EN 60695-11-10 is carried out using the determined for three specimens sixth time periods and optionally the damage lengths.
  • the invention in another aspect, relates to a device for carrying out a firing test on a test object with at least one first camera for optical detection of the test object and means for image processing of the image data recorded with the at least one first camera.
  • the device also has means for determining a reference point of the test object based on the recorded image data and means for positioning a burner at a predetermined first distance to the reference point, wherein the burner is provided for flaming the test object.
  • the invention relates to a computer program product with computer-executable instructions for carrying out the method according to the invention.
  • Fig. 1 shows a block diagram of a device 100 for performing a fire test.
  • the device 100 has a test chamber 102 and a computer system 104.
  • the test chamber 102 has a positioning system 128 for a burner 110.
  • the test chamber 102 has a positioning system 130 for a first camera 106 and a device 132 for a specimen 112.
  • the computer system 104 has a screen 114, a microprocessor 116 and a memory 118 ,
  • the microprocessor 116 of the computer system 104 executes a computer program product 120.
  • the burner 110 can be moved in all three spatial directions.
  • the positioning system 130 furthermore, the first camera 106 is positioned such that the test object 112 is optically detected by the first camera 106.
  • the image data taken by the first camera 106 from the device under test 112 are transmitted to the computer system 104.
  • the computer program product 120 is used for image processing of the image data taken via the first camera 106.
  • An image 122 of the device under test 112 can be displayed, for example, on the screen 114.
  • the computer program product 120 can determine the contours of the device under test 112. In this way, the position of the test object 112 in the test chamber can be detected by the image processing and a reference point 124 in the test object can be determined.
  • the computer program product 120 now controls the positioning system 128 so that the torch 110 is positioned at a predetermined first distance 126 from the reference point.
  • the first distance 126 between the reference point 124 and the burner 110 is measured with respect to the burner tip.
  • the first distance 126 may be calibrated, for example, based on a reference image.
  • a reference image For this purpose, an image of the specimen 112 and the burner 110 is taken via the first camera 106, wherein the burner with respect to the reference point 124 in the first distance, z. B. by an operator of the device has been positioned.
  • the image data of the reference image are stored by the computer program product 120 in the memory 118.
  • the first camera 106 captures image data from the torch 110 and the device under test
  • the computer program product 112 continuously calculates the distance between the torch 110 and the reference point from the current image 122 of the device under test 112 and the burner 110 124 (while the reference point 124 is constantly redetermined) and compares the currently determined distance in the image 122 with the distance specified in the image data of the reference image. If a discrepancy is detected therein, the computer program product adjusts the distance of the burner 110 in the test chamber 102 to the first distance 126.
  • the second camera 108 serves to detect the burner flame.
  • the second camera 108 is mounted in the test chamber 102 in such a way that the burner flame of the burner 110 can be detected, for example, before the test piece 112 is flame-treated.
  • the image data captured by the second camera 108 are processed by the computer program product 120.
  • the color of the flame for example, according to the rgb color model certainly. According to the rgb color model, a color is described according to its red, green and blue light component (between 0% and 100%, respectively).
  • the determined color of the burner flame is then compared with a predetermined color of a desired flame.
  • the target flame corresponds to a burner flame, which is set to a predetermined nominal power, for example 50 watts according to EN 60695-11-10. If the burner flame does not correspond to the desired flame, the computer program product 120 initiates an exchange of the burner by another burner.
  • the positioning system 128 deposits the burner 110 in a burner magazine, not shown here, in which further burners are held and removes one of the further burners from the burner magazine, which is then used to flame the test object.
  • Fig. 2 shows a flowchart representing steps of the method according to the invention for performing a burning test on a test specimen.
  • step 200 the image data acquisition of the test object takes place with at least one first camera.
  • step 202 the image data recorded with the at least one first camera is processed, whereby a reference point of the test object is determined.
  • step 204 the positioning of a burner at a predetermined first distance to the reference point for flame of the specimen takes place.
  • Fig. 3 shows a positioning system 300 for positioning the cameras and the burner.
  • the positioning system includes cameras 306, 308, 310 and 312. Furthermore, the positioning system 300 has red light emitters 314 and 316 and a mirror 318.
  • the cameras 306 and 308 are used for image data acquisition of the specimen 302 and the burner 304.
  • the specimen 302 can be continuously optically detected from two sides.
  • a change in position and / or shape of the specimen for example an extension of the specimen along the Y-axis (see coordinate system 320) or a shrinkage of the specimen 302 with respect to the Y-axis, for example by burning the specimen, or a movement of Test objects in the XZ plane can thus be detected optically and detected accordingly by the image processing.
  • the positioning system 300 may further comprise the Burner 304 are readjusted so that the tip is positioned remotely at the first distance to the reference point. Furthermore, the cameras 306 and 308 can be traced so that the cameras 306 and 308 detect the specimen 302 in the center of the image.
  • the specimen 302 and the camera 308 is illuminated by the red light emitter 316.
  • the red light emitter 314 illuminates the DUT 302 and the camera 306, whereby flames from the camera 306 are no longer detected.
  • the light of the red light emitter 314 is thereby deflected via the mirror 318 so that the system 300 can be made somewhat more compact.
  • the cameras 310 and 312 it is detected whether the specimen 302 is burning.
  • they are positioned by the positioning system 300 around the specimen such that the specimen 302 can be optically detected by the cameras.
  • the cameras 310 and 312 are color cameras that constantly provide images to the image processor, whereby by analyzing the image data, it can be determined whether the device under test 302 is burning.
  • Fig. 4 shows the receptacle 400 of a first surface side 402 of the test piece and the burner tip 404.
  • the surface side 402 is along the XY plane (see Fig. 3 ) and can be read by the camera 306 (cf. Fig. 3 ).
  • the contours of the surface side 402 of the test object can be determined.
  • a first guideline 406 running horizontally, ie along the X-axis, can be determined.
  • Fig. 5 shows a receptacle 500 of a second surface side 502 of the test piece and the burner tip 504.
  • the surface side 502 is in the YZ plane (see Fig. 3 ) and may, for example, by the camera 308 (see. Fig. 3 ).
  • the outlines of the second surface side 502 can be determined. This allows a second guideline 506 running along the Z-axis to be determined for the second surface side.
  • Fig. 6A schematically shows the first surface side 402 with the first guideline 406.
  • the first guideline 406 is thereby determined so that it over a predetermined minimum length (1) along the X-axis and as far down with respect to the Y-direction through the first surface side 402 runs.
  • the image data processing determines a first region 408 corresponding to the part of the device under test that is below the first directive. If the first region 408 has a minimum height (distance between the lower edge of the specimen to the first guideline 406) and a minimum width (average width of the first region along the X axis), the first region is identified by the image processing as a thread, for example indicating a forthcoming drop.
  • the first guideline 406 further defines two out of three coordinates of the reference point (X 0 , Y 0 , Z 0 ).
  • the Y-coordinate of the reference point (Y 0 ) results from the fact that the first guideline is perpendicular to the Y-axis.
  • the X-coordinate of the reference point (X 0 ) results from the X-coordinate of the center of the first guideline 406.
  • Fig. 6B schematically shows the second surface side 502 with the second guideline 506.
  • the guideline 506 is laid through the second surface side 502 so that it is at the same height with respect to the Y axis as the first guideline 406.
  • the last missing coordinate for the reference point (Z 0 ) can be set. This results from the Z-coordinate of the center of the reference line 506.
  • Fig. 6C shows a section through the rod-shaped and substantially rectangular shaped specimen transverse to its longitudinal direction, ie a section through the XZ plane.
  • Fig. 7 shows a block diagram of a device 700 for performing a fire test.
  • the apparatus 700 includes a sample magazine 702, a programmable logic controller 704, a computer system 706, and a test chamber 708 up.
  • the sample magazine 702 contains a stock 710 of samples to be subjected to a fire test. Furthermore, the sample magazine 702 contains a measuring device 712.
  • the samples held in stock have, for example, a sample size of 12.7 mm ⁇ 127 mm and a thickness in the range from 0.5 mm to 3.5 mm.
  • the stock 710 of specimens includes, for example, 250 specimens.
  • the stock 710 is stored in the sample tray 702 under the climatic conditions dictated by the standard used in the test. For example, standard EN 60695-11-10 requires storage of 710 storage for at least 48 hours at (23 ⁇ 2) ° C and a relative humidity of (50 ⁇ 5)%.
  • a specimen 714 is removed from the specimen magazine and fed to the test chamber 708. Beforehand, the thickness of the test object is still determined by means of the measuring device 712. The repositioning of the test piece 714 from the sample magazine into the test chamber can be fully automatic and controlled by the programmable logic controller 704.
  • the test chamber 708 has a holding device 716 for the test piece 714. Further, the test chamber 708 has a burner positioning system 718, camera systems 720, a cotton roll magazine 722, and cotton wad positioning means 724.
  • the test piece 714 is received by the holding device 716 and fixed so that it can be detected by the camera systems 720.
  • the burner positioning system 718 may further position a burner 728 at the first predetermined distance with respect to a reference point determined via an image processing component 726 of the computer system 706, as described above.
  • the camera systems 720 thereby constantly provide image data of the device under test 714 and the burner 728 used for flame treatment of the device under test 742 to the image processing 726, so that initiated by the image processing 726 and controlled by the programmable logic controller 704, the burner positioning system 718 the burner 728 during the flame of the test piece 714 can keep at the first distance to the DUT.
  • At least one cotton roll is held in the cotton roll magazine 722 from which cotton wool, for example 50 mm ⁇ 50 mm ⁇ 6 mm, is provided by means of a separating and feeding system. is separated and the positioning means 724 is supplied. The cotton wool is then placed under the specimen by the positioning means 724.
  • the cotton wool serves as an indicator for burning drops.
  • we preferably the cotton wool in the separation and feed system eg by blowing with a nitrogen jet loosened.
  • nitrogen nozzles are provided for blowing out a burning cotton wool.
  • the device 700 may further include a waste magazine, not shown here, in which spent cotton and spent specimens, each separated, are disposed of.
  • the test apparatus 700 may include a magazine in which holding devices are kept.
  • the holding devices such as holding device 716, typically have a gripper, with which the test piece 714 is clamped.
  • the gripper can become dirty, e.g. when the test piece 714 burns to the gripper.
  • the dirty holding devices are also disposed of in the waste magazine, separated from the cotton wool and the specimens.
  • one or more nitrogen nozzles for blowing out a burning test object may be attached around the gripper and / or the flamed test specimen.
  • Fig. 8 shows a flow chart showing essential steps to perform a vertical combustion test according to EN 60695-11-10.
  • the test specimen firing begins for 10 seconds.
  • step 808 it is detected when the drop leaves the sample. If the drop hits the burner tube, a burner change occurs in step 810 and the process is restarted in step 800 with a new sample. If it is detected in step 808 that the outgoing drop did not affect the burner, the flame will be ignited continued until the lapse of 10 seconds, and then in step 804 the torch is laterally retracted after flame exposure.
  • step 812 the post-bake time of the device under test is detected. If the test object expires within 35 seconds, the method is continued with step 826, wherein the method steps 800 to 812 on the same test object are again carried out to determine a second afterburn time. If the test piece does not extinguish after 35 seconds, the flame is observed in step 814 for another 35 seconds. If it is determined in step 816, after the lapse of 35 seconds, that the flame is extinguished, the method continues with step 826, wherein the method steps 800 to 812 are again performed on the same test object to determine a second afterburn time.
  • step 816 If it is determined in step 816 that the flame is not extinguished, then in step 818 the flame is extinguished, for example by blowing the test specimen with nitrogen. Further, in step 820, it is determined whether a drop has left the burning sample. If this is the case, in step 822 the cotton placed under the test piece is replaced with new cotton wool and the method is ended with step 824. Otherwise, following step 820, the method is terminated directly with step 824.
  • Fig. 9 schematically shows the arrangement of the test piece 900 and burner 902 in the vertical combustion test according to EN 60695-11-10.
  • the test piece 900 is rectangular in shape. It is suspended from the fixation 906 (here a tripod) so that its longitudinal axis is vertically aligned.
  • the tip of the burner is located at a distance of 10 ⁇ 1 mm below the lower edge of the specimen, wherein the longitudinal axis of the specimen 900 coincide with the center axes of the burner 902.
  • cotton wool 904 is placed at a distance of 300 ⁇ 10 mm from the lower edge of the test piece.
  • the cotton wool 904 has the dimensions 50x50x6 mm.
  • the reference point determined by the image processing essentially corresponds to the intersection of the longitudinal axis of the test piece 900 with the lower edge of the test piece 900. However, if the test piece burns or if the test piece expands due to the action of the flames, then the reference point changes its position. By tracking the burner 902 over here not shown burner positioning system (see. Fig. 7 ), the distance between the burner tip and the reference point can be adjusted to 10 ⁇ 1 mm.
  • Fig. 10 schematically shows the tilting of the burner 902 during the flame of the test piece 900 (see. Fig. 9 ) to prevent drops from the DUT from affecting the burner flame.
  • the left part of the Fig. 10 shows the burner 902 at a distance of 10 mm below the test piece 900, as in Fig. 9 described.
  • the first camera is preferably a high-speed camera, so that parts falling from the test object 900 can be detected by the image processing.
  • the burner In the detection of such a sloping part, ie in the detection of a drop, the burner, as in the right part of the Fig. 10 shown, swung sideways, so that the drop can not affect the burner flame.
  • the center axis of the burner is tilted by up to 45 ° and the burner is moved laterally away from the specimen, however, there is a further flame of the specimen and the distance in the vertical direction between the burner tip and reference point is controlled to 10 mm.
  • the burner is moved back to the position shown in the left part of the picture.
  • Fig. 11 schematically shows the arrangement of DUT 1100 and burner 1102 in the horizontal burning test according to EN 60695-11-10.
  • the test piece is designed essentially rectangular rod-shaped.
  • the specimen 1100 is held by a fixing 1106 so that its longitudinal axis is aligned horizontally and its transverse axes are oriented substantially at an angle of 45 ° to the horizontal.
  • the test specimen has a first mark 1108 and a second mark 1110 attached.
  • the first mark 1108 is located at a distance of 25 ⁇ 1 mm to a surface 1112 of the test object and the second mark 1110 is located at a distance of 100 ⁇ 1 mm from the surface 1112.
  • a reference line 1114 is determined, wherein the reference line corresponds to the lower edge of the test piece 1110.
  • the Reference point 1104 is determined by the image processing as an intersection between the reference line 1114 and the surface 112.
  • the torch 1102 is now positioned to flame the specimen 1100 so that its central axis 1118 is at an angle of about 45 ° to the vertical and that the tip 1116 of the torch is on the (extended) reference line 1114, with the distance between tip 1116 and reference point 1104 corresponds to a predetermined value.
  • the predetermined value can be adjusted so that the free end of the specimen is flamed to a length of about 6 mm.
  • the test object is also detected optically according to the invention by at least one camera and the image data thus obtained are evaluated via the image processing. As a result, the times at which the flames reach the first mark 1108 and the second mark 1110 can be determined.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)
  • Treatment Of Fiber Materials (AREA)
EP08012374.8A 2007-07-13 2008-07-09 Procédé et dispositif destinés à la réalisation d'un contrôle de combustion sur un échantillon Active EP2015055B1 (fr)

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DE102007032665.5A DE102007032665B4 (de) 2007-07-13 2007-07-13 Verfahren und Vorrichtung zur Durchführung einer Brennprüfung an einem Prüfling

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EP2015055A1 true EP2015055A1 (fr) 2009-01-14
EP2015055B1 EP2015055B1 (fr) 2015-06-24

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CN105021763A (zh) * 2014-04-22 2015-11-04 天津天锐哥马克阻燃测试技术有限公司 一种阻燃测试仪燃烧器调节装置
RU2642461C1 (ru) * 2016-11-18 2018-01-25 Российская Федерация, от имени которой выступает Государственная корпорация по атомной энергии "Росатом" (Госкорпорация "Росатом") Установка для испытаний объекта на температурные воздействия
RU2739837C1 (ru) * 2020-07-22 2020-12-28 Гришин Кирилл Вячеславович Печь для испытаний на огнестойкость и пожарную безопасность строительных конструкций и инженерного оборудования
CN117706020A (zh) * 2023-12-08 2024-03-15 温州市大荣纺织仪器有限公司 一种轰燃条件下燃烧假人系统的燃烧器装置

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ES2551030B2 (es) * 2014-12-26 2016-04-06 Universidad De Cantabria Portamuestras y método para la realización de ensayos de fuego de elementos multicapa
US12050115B2 (en) * 2020-06-01 2024-07-30 Right Testing Labs Product testing with synchronized capture and presentation of multimedia and sensor data
CN111983133B (zh) * 2020-08-24 2022-05-10 常州大学 一种模拟管廊管道火灾实验平台及其实验方法
US11620810B2 (en) * 2020-11-23 2023-04-04 Corning Research & Development Corporation Identification of droplet formation during cable burn testing
CN112415128A (zh) * 2021-01-20 2021-02-26 潍坊凯速建筑科技有限公司 一种建筑防火材料检测设备
RU207427U1 (ru) * 2021-04-02 2021-10-28 Сергей Владимирович Лекторович Огневая камера для определения значения огнетушащей концентрации газовых огнетушащих веществ
US11906453B1 (en) * 2021-11-29 2024-02-20 Bruce Campbell Candle combustion testing apparatus
CN114965860B (zh) * 2022-07-26 2022-10-21 深圳市众森阻燃消防材料有限公司 基于阻燃板阻燃测试的作业环境火灾消防安全监测系统
CN116893243B (zh) * 2023-09-07 2023-11-28 泰州市华通消防装备厂有限公司 一种防火面料防火性的检测装置

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DE1132361B (de) 1960-02-29 1962-06-28 Chemstrand Corp Geraet zur Pruefung der Brennbarkeit von Materialien
GB1356023A (en) 1971-02-10 1974-06-12 Carroll Porczynski C Z Falammability testing of materials
US3930397A (en) 1974-08-28 1976-01-06 Shigeru Suga Combustion testing apparatus
EP1347294A2 (fr) 2002-03-19 2003-09-24 Bayer Aktiengesellschaft Dispositif de test automatique de combustion

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Publication number Priority date Publication date Assignee Title
CN105021763A (zh) * 2014-04-22 2015-11-04 天津天锐哥马克阻燃测试技术有限公司 一种阻燃测试仪燃烧器调节装置
RU2642461C1 (ru) * 2016-11-18 2018-01-25 Российская Федерация, от имени которой выступает Государственная корпорация по атомной энергии "Росатом" (Госкорпорация "Росатом") Установка для испытаний объекта на температурные воздействия
RU2739837C1 (ru) * 2020-07-22 2020-12-28 Гришин Кирилл Вячеславович Печь для испытаний на огнестойкость и пожарную безопасность строительных конструкций и инженерного оборудования
CN117706020A (zh) * 2023-12-08 2024-03-15 温州市大荣纺织仪器有限公司 一种轰燃条件下燃烧假人系统的燃烧器装置

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EP2015055B1 (fr) 2015-06-24
US20090015837A1 (en) 2009-01-15
US7894066B2 (en) 2011-02-22
DE102007032665A1 (de) 2009-01-15

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